From BBC Video. The TARDIS arrives in 2070 AD on the Moon, where a weather control station under the command of a man named Hobson is in the grip of a plague epidemic. The Doctor, along with his friends Polly, Ben, and Jamie, is accused of starting the plague. It is not long, however, before the time travelers discover the true cause of the death - a powerful, unstoppable race the Doctor has met before, the Cybermen.